TableView.CustomBestFit Event
Allows you to manually calculate the optimal width for a column(s).
Namespace: DevExpress.Xpf.Grid
Assembly: DevExpress.Xpf.Grid.v23.2.dll
NuGet Package: DevExpress.Wpf.Grid.Core
Declaration
Event Data
The CustomBestFit event's data class is CustomBestFitEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| BestFitMode | Gets or sets how the optimal width required for a column to completely display its contents is calculated. This is a dependency property. Inherited from CustomBestFitEventArgsBase. |
| BestFitRows | Rows that should be taken into account when calculating the optimal width of CustomBestFitEventArgs.Column. Inherited from CustomBestFitEventArgsBase. |
| Column | Provides access to a grid column whose width should be adjusted. |
| Handled | Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs. |
| OriginalSource | Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs. |
| RoutedEvent | Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs. |
| Source | Gets the View that raised the event. |
The event data class exposes the following methods:
| Method | Description |
|---|---|
| InvokeEventHandler(Delegate, Object) | When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs. |
| OnSetSource(Object) | When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs. |
Remarks
The CustomBestFit event occurs before the Best Fit feature is applied to a column. Handle this event to manually calculate the optimal width for a column. You can do the following:
Change the Best Fit Mode
The CustomBestFit event occurs if the ColumnBase.BestFitMode property is set to BestFitMode.Smart or BestFitMode.Default. By default, the column’s optimal width is calculated as BestFitMode.AllRows if the total number of cells is less than 3,000, and as BestFitMode.DistinctValues if the total number of cells is greater than or equal to 3,000. Use the event parameter’s CustomBestFitEventArgsBase.BestFitMode property to select the required mode.
Manually Specify Rows
Populate the CustomBestFitEventArgsBase.BestFitRows collection with rows that should be taken into account when calculating the optimal width of CustomBestFitEventArgs.Column.